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Reduction of Alkenes: Catalytic Hydrogenation

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Alkenes undergo reduction by the addition of molecular hydrogen to give alkanes. Because the process generally occurs in the presence of a transition-metal catalyst, the reaction is called catalytic hydrogenation.
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Engineering Pt/Pd Interfacial Electronic Structures for Highly Efficient Hydrogen Evolution and Alcohol Oxidation.

Jinchang Fan¹, Kun Qi¹, Lei Zhang¹

¹State Key Laboratory of Automotive Simulation and Control, Department of Materials Science, Jilin University , Changchun 130012, People's Republic of China.

ACS Applied Materials & Interfaces

|May 11, 2017

Summary

Designing palladium-platinum (Pd-Pt) interfaces with specific crystal facets significantly enhances catalytic activity for hydrogen evolution and alcohol oxidation reactions. The Pd(100)-Pt interface shows superior performance compared to Pd(111)-Pt.

Keywords:

Pt-based catalyst crystal facets ethanol oxidation reaction hydrogen evolution reaction interfacial electronic structure

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Multiscale Sampling of a Heterogeneous Water/Metal Catalyst Interface using Density Functional Theory and Force-Field Molecular Dynamics

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Published on: April 12, 2019

Area of Science:

Materials Science
Catalysis
Surface Chemistry

Background:

Optimizing platinum-based catalysts is crucial for efficient chemical reactions.
Understanding the role of interfacial structure and facets in catalyst performance is key.
Limited research exists on the direct correlation between interfacial facets and catalytic activity.

Purpose of the Study:

To investigate the influence of interfacial crystal facets on the catalytic activity of Pd-Pt heterostructures.
To design and synthesize Pd-Pt interfaces with controlled heterostructure features.
To elucidate the relationship between electronic structure modulation and catalytic performance.

Main Methods:

Epitaxial growth of platinum nanoparticles on palladium nanosheets.
Density functional theory (DFT) calculations.
Experimental validation of catalytic activity for hydrogen evolution and alcohol oxidation.

Main Results:

Charge transfer between Pd and Pt is critically dependent on the interfacial crystal facets of the Pd substrate.
The Pd-Pt heterostructure with a Pd(100)-Pt interface demonstrates superior activity and stability.
Performance surpasses that of Pd(111)-Pt interfaces and commercial Pt/C catalysts.

Conclusions:

Interfacial crystal facet engineering is a powerful strategy for designing high-performance catalysts.
Electronic structure modulation at the interface dictates catalytic efficiency.
This work provides insights for developing novel heterostructures for electrocatalysis.